<i id='3CEAF37913'><strike id='3CEAF37913'><tt id='3CEAF37913'><bdo date-time="090b46"></bdo><dfn dir="58641d"></dfn><font lang="66ccd4"></font><pre date-time="2867b7" id='3CEAF37913'></pre></tt></strike></i> By Helen Briggs and Victoria Gill for BBC News
A humpback whale. Photo: konart/123RF
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